HP StorageWorks External Storage XP user guide (T1706-96006, June 2006)

External Storage XP user guide 105
use the Delete LU command to delete the mapping between an internal LDEV and external LU, you cannot
use this command to reliably delete data in the external LU or internal LDEV.
Before deleting the external LU mapping, notice if any of the following are true:
• Whether or not the execution of any application (for example, RAID Manager XP) that is using the
command device is in progress.
If any application using an external LU command device is executing, stop the application.
• Whether the Disconnect Subsystem or Disconnect Volumes command was executed.
All data in cache memory must be written into the mapped external LU using the Disconnect Subsystem
or Disconnect Volume command. For more information about the Disconnect Subsystem and Disconnect
Volume commands, see ”Disconnecting external arrays or LUs” on page 98.
• The volume is part of a LUSE volume.
• A path is set.
• The volume is configured as part of a Continuous Access XP, Continuous Access XP Journal, Business
Copy XP, or Snapshot XP pair.
• The volume is set as a reserved LU for Business Copy XP or Auto LUN XP.
• The volume is set as a pool-VOL.
If any of these conditions are true, you cannot delete the external LU mapping.
1. In the LU Operation pane, select the external LU group number in the Device tree. Information about the
external LU mapped as an internal LDEV appears in the Device list.
2. In the Device list, right-click the external LU for which you want to delete the mapping, and select Delete
LU.
Settings appear in blue italics in the Device list, and they appear in the Preset list. To check details
regarding intended changes, right-click the setting in the Preset list, and select Detail. To cancel
settings, right-click the setting in the Preset list, and select Delete.
NOTE: The maximum number of external LUs you can set at one time is 256.
3. Click Apply. A confirmation message appears.
If you already stopped the application, go to step 4. If you have not stopped the application, click
Cancel, stop the application, and retry the operation.
4. Click OK. A confirmation message appears.
5. Click Yes or No.
If you click Yes, a confirmation message appears.
If you click No, a warning message appears. To execute the Delete LU operation without writing data in
the local array cache memory to the external LU, click OK. To cancel the operation, click Cancel. If you
click OK, a confirmation message appears.
NOTE: If you click OK in response to the warning, the Delete LU operation is performed, but data
in the local array cache memory that is not yet written to the external LU might be lost.
6. Click OK. The external LU whose mapping is deleted is removed from the Device list.
If errors occur, failed settings and error codes appear in the Preset list. To check error messages,
right-click the failed setting, and select Detail.